Trap



Patented May 15, 1928.

UNITED STATES PATENT OFFICE.

JOSEPH 1!. LE GRAND, OF-BALTIMORE, MARYLAND, ASSIGNOR TO CARRIER ENGI- NEERING CORPORATION, A CORPORATION OF NEW YORK.

' TRAP. n

Application filed. April 19, 1926. Serial No. 102,948.

The object of my invention is the providing of an improved trap in a dust-separating system.

A further object of my invention is the providing a dust trap, or separator, in which the finest particles may be removed from gaseous suspension with the minimum loss of such particles in a separation thereof with the minimum movement of said gas.

A further object of my invention is an improved means for the control of the movement of gases bearing solids, in a separating appliance.

A further object of my invention is the providing of plural separation in a stepdown system of exhaust separation.

A further object of .my invention is the providing of plural separation in a stepdown system of exhaust separation and the introduction of gas-bearing substance by a tangential admission under a diminished pressure.

A further object of my invention is an improved method for handling air bearing dust to extract the dust therefrom with a minimum movement of said air.

With the foregoing and other objects in view, my invention consists of the methods employed, combination and arrangement of systems, apparatus and means as hereinafter specifically provided and illustrated in the accompanying drawing wherein is shown the preferred embodiment of my invention, but it is understood that changes, variations and modifications may be resorted to which come within the scope of the claims hereunto appended.

In the drawing of the herein-described embodiment of my invention, Fig. 1 is a sectional view in elevation of my improved dust-tra or se ar'ator- Fi 2 is a sectional view taken through 22 of Fig. 1; Fig. 3 is a sectional view taken through 3-3 of Fig. 1; Fig. 4 is a sectional view taken through 4-4 of Fig. 1; and Fig. 5 is a sectional view taken through 5-5 of Fig. 2.

. Similar numerals refer to similar parts throughout the several views.

1 is the outside drum, or shell. 2 is the partition dividing the space Within shell 1 into a plurality of compartments, as shown into compartment A, and compartment B. 3 is the head of shell'l and formsthe top of compartment A. 4 is the bottom of the shell and forms together with trap-door 5 the bottom of compartment B.

6 is an exhaust pipe leading from the central portion of head 3 and extends some distance within A,yand the outer end of this exhaust pipe is provided with some means for exhaustion not shown. 7 isan exhaust pipe in the central portion of partition 2 extending some distance within chamber B, and also extends some distance within exhaust pipe 6. The opening, or inlet, into exhaust pipes 6 and 7 are enlarged as shown at 13 and 14 respectively.

justed with reference to each other and the,

movement of the gas in chamber A so as to permit the desired diversion or deflection of the gas into chamber B.

11 is the inlet pipe entering chamber A preferably tangentlally, as shown in Fig. 2. 5 is the bottom trap-door, or dumping means.

The operation of my invention is as follows:

Inlet pipe 11 is attached so as to collect and convey the gas suspended matter into the separator tangentially so as to cause a whirl within the same the centrifugal motion of which throws the heavier particles in suspension to the periphery and gravity tends to draw the same downward, thus we get the gas superdoaded in the outer and lower portions of chamber A.. At this point slit 8 takes the heavier portion slicing it as it were from the bottom of the whirling mass, and deflects it into chamber B.

Exhaust pipe 6 is so connected as to convey the gas relieved of its load where dcsired, preferably through an exhausting means, such as an exhaust blower. The matter extracted from the conveying gas is removed through the bottom trap-door or dumping means 5.

The creation of a partial vacuum, or. diminished pressure, in exhaust pipe 6 causes an inflow therein from compartment A and also an inflow through exhaust pipe 7 concentric within the same. The ratio hetvveen the said two pipes heing determined by the relative sizes of the said two pipes, their inlet orifices and dampers controlling the same, and the slit 8, or other openings, between compartments A and B, this is adjusted by means of dampers 15 and 16 through hand-hold 17.,

The gas in entering compartment B through slit 8 is suddenly reduced in velocity to almost a quiescent state, and the suspended matter is allowed to settle. The large opening of pipe 7 facilitates this. To withdraw the deposited matter the movementof the gas is stopped and trap-door 5 is opened, thus allowing the solid matter or sediment to descend.

Having thus described my invention, what claim and desire to secure by Letters Patent is:

It. A plurality of separating chambers one chamber of which is provided with means for rotating gas admitted thereto so as to eaner? sweep the interior surface thereof, a break in the door of said surface to interrupt the gas in proximity thereto to'cause the same to How into the other of said chambers through means provided, and means for exhausting gas from said two chambers consisting of a unified exhaust comprising an exhaust from each chamber connecting into a single exhaust.

2. A plurality of separating chambers one chamber or which is provided with means for rotating gas admitted thereto so as to sweep the interior surface thereof, a break in the tloor of said surface to interrupt the 

